1995 Oldsmobile Achieva Owner's Manual - Page 246

When rotating your tires;.always use the correct rotation pattern shown here. Don't include the compact spare tire in your tire rotation. After the tires have been rotated, adjust the front and rear inflation pressures as shown on the Tire-Loading Infc~-mation label. Make certain that all wheel nuts are. properly tightened. See "Wheel Nut Torque" in the Index. When it's Time for New Tires One way to tell when it's time for new tires is to check the treadwear indicators, which will appear when your tires have only I /16 inch ( I .6 mm) or less of tread remaining. Rust or dirton a wheel, or on the parts to which it is fastened, canmake wheel nuts become loose after a time. The wheel could come and cause off an accident. When you change a wheel, remove any rust or dirt from places wherethe wheel attaches to the vehicle, In anemergency, you can use a cloth or a paper towel to do this; but be sure to use a scraper orwire brush later, if you need to, to get all rust or dirt (See the off. "Changing a Flat Tire" in the Index.) I You need a new tire if: You can see the indicators at three or more places around the tire. You can see cord or fabric showing through the tire's rubber. The tread or sidewall is cracked, cut or snagged deep enough to show cord or fabric.